Process for preparing surface functional crosslinking polystyrene micro ball
A technology of cross-linked polystyrene and surface functionalization, which is applied in the field of preparation of functional polymer microspheres, and can solve the problems that the proportion of functional groups is not very high and functional polymer microspheres are uneconomical.
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Embodiment 1
[0016] At room temperature, add potassium persulfate, divinylbenzene, water and acetone successively into the container, stir to make them fully mixed, transfer them into the polymerization reaction tube, then add p-chloromethylstyrene and styrene, so that styrene: p Chloromethylstyrene: potassium persulfate: the mol ratio of divinylbenzene is 1: 0.2: 0.005: 0.005, the consumption of total solvent is 25 times of total monomer volume, and the consumption of acetone is 10% of total solvent volume . Continuously feed high-purity nitrogen for 10-40 minutes to remove oxygen, seal the tube, then place the polymerization reaction tube in a constant temperature water bath at 60°C, and oscillate (oscillation frequency 100-300rpm) for 24 hours. Dialysis was performed after the reaction to remove unreacted monomers. Cross-linked polystyrene microspheres containing chlorine atoms on the surface were obtained.
[0017] Measure a certain volume of polymer emulsion in a reaction vessel, us...
Embodiment 2
[0019] Add ammonium persulfate, N,N'-methylenebisacrylamide, water and ethanol in turn to the container at room temperature, stir to make them fully mixed, transfer them into the polymerization reaction tube, and then add 2-(2'-chloro Propionic acid) ethyl acrylate, styrene so that the molar ratio of styrene: 2-(2'-chloropropionic acid) ethyl acrylate: ammonium persulfate: N, N'-methylenebisacrylamide is 1:0.17 : 0.01: 0.01, the consumption of total solvent is 30 times of total monomer volume, and the consumption of ethanol is 20% of total solvent volume. Continuously feed high-purity nitrogen for 10-40 minutes to remove oxygen, seal the tube, then place the polymerization reaction tube in a constant temperature water bath at 70°C, and oscillate (oscillation frequency 100-300rpm) for 16 hours. Dialysis was performed after the reaction to remove unreacted monomers. Cross-linked polystyrene microspheres containing chlorine atoms on the surface were obtained.
[0020] Measure a...
Embodiment 3
[0022] Add potassium persulfate, N,N'-methylenebisacrylamide, water and acetone in sequence in the container at room temperature, stir to make them fully mixed, transfer them into the polymerization reaction tube, then add p-bromomethylstyrene, Styrene, make styrene: p-bromomethylstyrene: potassium persulfate: N, the molar ratio of N'-methylenebisacrylamide is 1: 0.14: 0.015: 0.015, and the consumption of total solvent is total monomer volume 25 times of the amount, the consumption of acetone is 30% of the total solvent volume. Continuously feed high-purity nitrogen for 10-40 minutes to remove oxygen, seal the tube, then place the polymerization reaction tube in a constant temperature water bath at 80°C, and oscillate (oscillation frequency 100-300rpm) for 10 hours. Dialysis was performed after the reaction to remove unreacted monomers. Cross-linked polystyrene microspheres containing bromine atoms on the surface were obtained.
[0023] Measure a certain volume of polymer em...
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